Post on 18-Apr-2015
PHYSICAL CONSTANTS (cgs)7
Physical Quantity Symbol Value Units
Boltzmann constant k 1:3807� 10�16 erg/deg (K)
Elementary charge e 4:8032� 10�10 statcoulomb
(statcoul)
Electron mass me 9:1094� 10�28 g
Proton mass mp 1:6726� 10�24 g
Gravitational constant G 6:6726� 10�8 dyne-cm2=g2
Planck constant h 6:6261� 10�27 erg-sec
�h = h=2� 1:0546� 10�27 erg-sec
Speed of light in vacuum c 2:9979� 1010 cm/sec
Proton/electron mass mp=me 1:8362� 103
ratio
Electron charge/mass e=me 5:2728� 1017 statcoul/g
ratio
Rydberg constant R1 =2�2me4
ch31:0974� 105 cm�1
Bohr radius a0 = �h2=me2 5:2918� 10�9 cm
Atomic cross section �a02 8:7974� 10�17 cm2
Classical electron radius re = e2=mc2 2:8179� 10�13 cm
Thomson cross section (8�=3)re2 6:6525� 10�25 cm2
Compton wavelength of h=mec 2:4263� 10�10 cm
electron �h=mec 3:8616� 10�11 cm
Fine-structure constant � = e2=�hc 7:2974� 10�3
��1 137:04
First radiation constant c1 = 2�hc2 3:7418� 10�5 erg-cm2=sec
Second radiation c2 = hc=k 1:4388 cm-deg (K)
constant
Stefan-Boltzmann � 5:6705� 10�5 erg/cm2-
constant sec-deg4
Wavelength associated �0 1:2398� 10�4 cm
with 1 eV
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Physical Quantity Symbol Value Units
Frequency associated �0 2:4180� 1014 Hz
with 1 eV
Wave number associated k0 8:0655� 103 cm�1
with 1 eV
Energy associated with 1:6022� 10�12 erg
1 eV
Energy associated with 1:9864� 10�16 erg
1 cm�1
Energy associated with 13.606 eV
1 Rydberg
Energy associated with 8:6174� 10�5 eV
1 deg Kelvin
Temperature associated 1:1604� 104 deg (K)
with 1 eV
Avogadro number NA 6:0221� 1023 mol�1
Faraday constant F = NAe 2:8925� 1014 statcoul/mol
Gas constant R = NAk 8:3145� 107 erg/deg-mol
Loschmidt's number n0 2:6868� 1019 cm�3
(no. density at STP)
Atomic mass unit mu 1:6605� 10�24 g
Standard temperature T0 273.15 deg (K)
Atmospheric pressure p0 = n0kT0 1:0133� 106 dyne/cm2
Pressure of 1 mm Hg 1:3332� 103 dyne/cm2
(1 torr)
Molar volume at STP V0 = RT0=p0 2:2414� 104 cm3
Molar weight of air Mair 28.971 g
calorie (cal) 4:1868� 107 erg
Gravitational g 980.67 cm/sec2
acceleration
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